<script type="text/javascript">
	let arr1=["北京","上海","广州","深圳"]
	let arr2=["杭州","苏州","西安","成都"]


	// let arr=["北京","上海","广州","深圳","杭州","苏州","西安","成都"]

	// arr1.push(...arr2)
	// console.log(arr1)

	let result=arr1.concat(arr2)
	console.log(result)

</script>